BACKGROUND: Dry reforming of methane (DRM) process has received considerable attention for the production of syngas, due to its great environmental and economic benefits. LaNiO3 and La0.5Sr0.5NiO3 nanoparticles were synthesized with the co-precipitation procedure using distilled and magnetic distilled water and examined as a catalyst in dry reforming of methane. RESULTS: The structure and morphology of the prepared nanoparticles were characterized by XRD, BET, SEM, TEM, TPR, TPD, and TPH techniques. The experimental results proved that the treated La0.5Ni0.5SrO3 catalyst has better initial performance in dry reforming of methane in comparison with the LaNiO3 catalyst, due to its greater surface basicity. The orientation for deposition of carbon over the surface of the consumed catalysts was as follows: La0.5Sr0.5NiO3 treat> La0.5Sr0.5NiO3 non.treat> LaNiO3 non.treat> LaNiO3 treat. CONCLUSION: Among the synthesized catalysts, the treated La0.5Sr0.5NiO3 sample exhibited higher initial DRM activity, due to the greater surface basicity. Also, the higher surface basicity of the Sr substituted catalyst led to an increase in CO2 desorption and coke deposition according to the Boudouard reaction.

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